*{
    margin: 0;
    padding: 0;
}
ul,ol{
    list-style: none;
}
a{
    text-decoration: none;
}
b,strong{
    font-weight: 400;
}
i,em{
    font-style: normal;
}
h1,h2,h3,h4,h5,h6,hgroup{
    font-weight: 400;
    font-size: 16px;
}
input{
    border: 0;
    outline: 0;
}
/* 清除图片的间距 */
img{
    display: block;
}
.clear-fix::after{
    content: " ";
    width: 0;
    height: 0;
    visibility: hidden;
    overflow: hidden;
    display: block;
    clear: both;
}